Products and coke shape-selectivity during anisole disproportionation over HZSM-5

Pichot, N.; Hounfodji, J.W.; Badawi, M.; Valtchev, V.; Mintova, S.; Gilson, J.-P.; Dufour, A.; Pinard, L.

doi:10.1016/j.apcata.2023.119352

Cited by 3 publications

(1 citation statement)

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“…Thus, the MCP product could possibly be formed by the isomerization of the CHA ring during the decomposition of CHL or CME over B acid sites. On the other side, BCH could be obtained as a result of Friedel–Crafts alkylation of anisole with CHL and subsequent HDO. , MCH, in turn, could be originated from the disproportionation of anisole on acid sites with the formation of PHE and ortho - and para -methyl-anisole and HDO of the latter or through the isomerization of anisole to cresol and further hydrogenation and deoxygenation. In addition, traces of CHE (<1%) were also detected.…”

Section: Resultsmentioning

confidence: 99%

Boosting the Hydrodeoxygenation Activity and Selectivity of Ni/(M)-SBA-15 Catalysts by Chemical Alteration of the Support

Calzada,

Pérez-Estrada,

Sánchez-Ramírez

et al. 2023

ACS Omega

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The influence of the acid sites in the hydrodeoxygenation of anisole performed over Ni catalysts supported on SBA-15 modified with metal oxides (Ni/M-SBA-15, M = Ti, Zr, Al, or Nb) was demonstrated. Catalysts were characterized by SEM–EDX, nitrogen physisorption, XRD, UV–visible DRS, TPR, TPD of ammonia, IR-Py, O2 chemisorption, and high-resolution transmission electron microscopy. The mesoporous structure and the hexagonal arrangement of the supports were maintained in the catalysts. Ni catalysts supported on modified M-SBA-15 exhibited a higher metal-support interaction, an increase in the acidity and, as a consequence, improved selectivity to cyclohexane. The deoxygenation reaction rate constants increased as Ni/SBA-15 < Ni/Ti-SBA-15 < Ni/Nb-SBA-15 < Ni/Zr-SBA-15 < Ni/Al-SBA-15, which is attributed to the increase in the amount and strength of acid sites, especially of the Brønsted ones, which promotes the cleavage of the C–O bond. It is also important to keep the metal/acid sites together to obtain high activity and selectivity to hydrodeoxygenated products.

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Section: Resultsmentioning

confidence: 99%